Pink: Striped white collar or plain shirt?

Hey guys! I didn't post much yet but I have been reading some. Anyway, I want to get myself a pink shirt and don't know exactly what I want yet. To be more concrete I don't know if I should go for the versatility of a plain pink standard collar - which would fit nicely under my navy pinestripe suit - or dare a bit more and get that one: https://dl.dropbox.com/u/7656988/screen.jpg I know it will not fit under my suit (or does it?) and thought about wearing it with a blue cardigan. What would you guys do? Just get both of em :P Maybe you can give me your opinion on the striped shirt too, would be nice to know what the community is thinking about it. TIA Daniel EDIT: Oh and maybe I should add, that I am only 18.